Upright steam boiler



Oct. 27, 1936. C; K, MATTHEWS 2,059,128

UPRIGHT STEAM BOILER Filed March 11, 19:55 L 2 sheets-'sheet 1 IDF' IO! O 014010 4 VEN TOR.

ATTORNEY.v

, Oct. 27, 1936. l I c. KQMATTHEwls v 2,059,128

UPRIGHT STEAM BOLER Filed March 11, 1955 2 Sheets-Share?. .2

INVENTOR.

v ATTORNEY.

Patented Oct. 27, 1936 UNITED STATES PATENT OFFICE 1 Claim.

It is well known that upright steam boilers having flues require frequent replacement of the flues because of the rapid erosive action thereon at the water line. This is objectionable chiefly because of the expense of maintenance and the loss incident to the shutting down of the boiler when making repairs.

Therefore, an essential feature of the invention is the provision of an upright boiler of the flue and tubular type having the flues completely submerged in water so as not to present a wa.- ter line for erosive action.

The invention furthermore aims to devise a steam boiler of the nature aforesaid which presents a. maximum heating surface and embodies a lower main portion and an upper removable auxiliary portion whereby access to the interior may be readily had for any desired purpose.

A further intent of the invention is the construction of a boiler of the type stated in which impurities in the water are separated both by precipitation and otation and collect at the bottom of the boiler as sediment and at the top of the boiler asrsoum to be blown or drawn oii at intervals, as desired.

While the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements the design may be varied and changes in the minor details of construction may be resorted to within the scope of the invention as claimed without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to-be had to the following description and the drawings hereto attached, in which:

Figure 1 is a vertical central sectional view of an upright steam boiler of the flue and tubular type illustrative of an embodiment of the invention, taken on the line I-l of Figure 2, and looking in the direction indicated by the arrows.

Figure 2 is a plan section on the line 2-2 of Figure 1.

Figure 3 is a horizontal section on the line 3 3 of Figure 1.

Figure 4 is a view similar to Figures 2 and 3 on the line 4--4 of Figure 1.

Corresponding and like parts are referred to in the following description and designated in the several Views of the drawings by like reference characters.

The body of the boiler comprises a lower main portion 5 and an upper removable portion 20 to admit of access to the interior for any desired purpose. Flue sheets 5a and 5b are disposed within the shell 5 and support flues i0. A re box H is disposed below the flue sheet 5b and has a door opening I2 in a side thereof. A perforate pipe Ma adjacent the flue sheet or bottom 5b projects beyond the side of the boiler and connects with a pipe M for carrying off the sediment. A water inlet pipe I3 connects with the lower port of the boiler.

A drum or auxiliary boiler 6, is located within the upper removable portion or shell 20, and is spaced therefrom and from the main boiler. A pipe 'l connects the lower portion of the auxiliary boiler 6 with the upper portion of the main boiler 5. A branch lo extends through the shell 20 and connects with the auxiliary boiler 6 a short distance above its bottom to maintain a supply of water therein and prevent burning of the bottom. A branch la extends within the boiler 5 and terminates adjacent the flue sheet or top 5a, to prevent the formation of a space and consequent water line in the upper portion of the main boiler 6. These branches 'la and lb form parts of the connecting pipe l. A pipe 8 connects the lower portion of the auxiliary boiler 6 with the lower portion of the main boiler 5. A branch 8b extends through the shell 20 and connects with the auxiliary boiler a short distance above the bottom thereof. A branch 8a extends within the main boiler and terminates some distance from the bottom thereof. A pipe B, corresponding to the pipe 8, similarly connects the main and auxiliary boilers.

The boiler is equipped with the usual steam gauge 24, water gauge 25, and safety valve 2G. The steam pipe i9 leads from the upper part of the auxiliary boiler through the shell 20. A pipe l1, similar to and for a like purpose as the pipe I4, has a perforate extension Ila within and adjacent the bottom of the auxiliary boiler 6 for carrying off sediment.

A scum trap 22 within the upper portion of the auxiliary boiler is of conical formation and has a pipe I8 leading from its apex through the sides of the shells S and 2i! to carry off the impurities collecting in the trap. The pipes i8, I1 and I4 contain Valves to admit of discharging the impurities at desired intervals. The trap 22 is supported within the boiler by stay bolts 23, or in any preferred manner, and operates as a baiiie to prevent water passing off through the several pipe connections leading from the upper part of the boiler E.

It will be understood from the foregoing and by reference to the accompanying drawings that an upright steam boiler constructed in accordance with the invention is free from any water line and the re tubes are completely submerged, hence there is no opportunity for the erosive action so destructive to the flues of upright boilers as generally constructed. It is further noted that the system of connecting pipes '1, 8 and 9, insures a positive circulation of water and rapid heating thereof. The disposition of the auxiliary boiler 6 results in a large area of heating surface. By having the pipes 1, 8 and. 9 connect with the boiler some distance above the bottom thereof, provision is had for trapping water in the lower portion of the auxiliary boiler to prevent burning of the bottom thereof. The top of the boiler is closed by a bonnet 2| to which a pipe may be tted for carrying 01T smoke or hot gases.

Having thus described the invention, what is claimed as new is:

In combination, a vertical re tube boiler, a casing arranged to seat upon the top of said boiler and defining a ue space, a steam and water drum arranged in said casing above said boiler and spaced from the Walls thereof, said steam and water drum having connections extending exteriorly of said casing and connecting the top of said boiler and the bottom of said boiler respectively with said drum so as to provide for circulation therebetween, and a conical surface blow 01T scum trap located adjacent the normal water level of said drum, said scum trap having connection at the bottom to a blow off pipe extending to the exterior of said casing.

CHARLES K. MATTHEWS. 

